Has my Windows 10 a Bluetooth support?

The solution is simple to see in Windows 10 a Bluetooth support, this Solution is also for Windows 8.1!

If you prefer to launch the programs from the Run dialog, press the [Windows+R] key combination and use devmgmt.msc to start in Windows 10 via command the Device Manager.

Or: Use the Windows-X Menu and start the Device Manager!

If the Bluetooth device is in the Device Manager the Bluetooth Device is correctly installed. If you don't have a Bluetooth device on your Tablet, Notebook or PC you must purchase for example an USB Bluetooth Device!
(... see Image-1)

Info: Many laptops have an external switch for turning the Bluetooth transmitter on or off!

When a Bluetooth enabled windows 10 computer is in discovery mode, it broadcasts a wireless signal that allows it to be detected by other windows 10 computers or devices. This is sometimes called pairing mode. If you check this box, your computer will still be able to detect Bluetooth enabled devices that are in discovery mode, but they will not be able to detect your computer.

If Bluetooth capability is integrated into your windows 10 computer, make sure the Bluetooth radio transmitter is turned on. This might also turn your wireless network receiver on and off. Many laptops have an external switch for turning the transmitter on and off. If you aren't sure how to turn it on, check the information that came with your computer or go to the manufacturer's website.